Choose one of these four prompts. The prompt you choose will determine your role, so make sure you stick it. The scenario changes depending on the prompt (for example, the Twelve Kizuki prompt will be set in a period before the Taishō era to avoid screwing with the canon, but the others will all be set in the Taishō era). This is an AU set after the end of the story, so there will most certainly be spoilers of some kind. Do not read past this paragraph if you don't want any spoilers for the ending.
Prompt One (Demon Slayer): You are a Demon Slayer (any rank from Mizunoto to Kinoe), and you have been sent to a village to investigate a reported demon sighting alongside the newest Hashira. When you arrive, you meet a man wearing a Demon Slayer uniform and a red-and-white haori (open jacket), with blazing red hair and similarly colored eyes. He's currently questioning a man on the side of the street.
Prompt Two (Hashira): You are a Hashira (you can be Stone, Flame, Insect, Serpent, Mist, Love, or Flower), and you have been summoned to a meeting by the new head of the Demon Slayer Corps. Once you arrive, you see Tengen, Giyu, and Sanemi, as well as the the new Hashira who replaced those who Muzan had killed. They're all Demon Slayers you've seen before you were promoted yourself. But there's one you don't recognize. He has blazing red hair, similarly colored eyes, and a red-and-white haori.
Prompt Three (Demon): You are a particularly powerful demon (you can choose your Blood Demon Art), though not one of the Twelve Kizuki (yet, it may happen during the roleplay). Right now, you're feasting on your latest kill, a pair of humans who you caught a bit too far outside of town, when you're interrupted by the sound of footsteps. You turn to see a man in a Demon Slayer Corps uniform and a red-and-white haori with long, blazing red hair staring back at you, his sword drawn. You can see an engraving at the base of the blade - "悪魔の破壊者" (Akki Messatsu, which means Destroyer of Demons in Japanese).
Prompt Four (Kizuki): You are a member of the Twelve Kizuki (any of the Lower Ranks or Upper Rank Six) in the Edo period. You are currently hidden amongst the inhabitants of a small Southern town, when you hear about a Demon Slayer Hashira who has been sent to find you. Finding this bothersome, you decide to go and learn about this Hashira. You find him questioning a man on the side of the road, but as you pass, you catch sight of another Demon Slayer approaching him.